Warning: Undefined array key "HTTP_REFERER" in /customers/8/d/3/stringway-nl.com/httpd.www/winkel/includes/configuration.php on line 21

Warning: Cannot modify header information - headers already sent by (output started at /customers/8/d/3/stringway-nl.com/httpd.www/winkel/includes/configuration.php:21) in /customers/8/d/3/stringway-nl.com/httpd.www/winkel/includes/db_connect.php on line 231

Fatal error: Uncaught Error: Call to undefined function mysql_query() in /customers/8/d/3/stringway-nl.com/httpd.www/winkel/includes/db_connect.php:62
Stack trace:
#0 /customers/8/d/3/stringway-nl.com/httpd.www/winkel/includes/configuration.php(52): sql_db->sql_query('SELECT id FROM ...')
#1 /customers/8/d/3/stringway-nl.com/httpd.www/winkel/index.php(8): require_once('/customers/8/d/...')
#2 {main}
  thrown in /customers/8/d/3/stringway-nl.com/httpd.www/winkel/includes/db_connect.php on line 62